Alterity Therapeutics Reports Positive Topline Data from Open-Label Phase 2 Clinical Trial of ATH434 in Multiple System Atrophy

Core Insights - ATH434 demonstrated clinical benefits in patients with multiple system atrophy (MSA), showing stabilization of neurological symptoms and a favorable safety profile [1][3][5] Clinical Trial Results - The ATH434-202 Phase 2 trial involved 10 participants with advanced MSA, treated with 75 mg of ATH434 twice daily for 12 months [6] - Over the treatment period, disease progression as measured by the Modified Unified MSA Rating Scale Part I (UMSARS I) was reduced by approximately 50% compared to historical controls [3] - 30% of participants reported stable neurological symptoms, which is notable given the advanced stage of their disease [3][11] Biomarker Outcomes - Neuroimaging results indicated that ATH434 slowed brain atrophy in MSA-affected areas, as measured by the MSA Atrophy Index (MSA-AI) [4][12] - There was a reduction in iron accumulation in the putamen and globus pallidus compared to placebo-treated patients, providing evidence of target engagement [4][12] Safety Profile - ATH434 was well-tolerated, with most adverse events being mild to moderate in severity, and no serious adverse events related to the treatment reported [12][19] Expert Commentary - The CEO of Alterity expressed encouragement regarding the positive results, reinforcing the efficacy observed in previous studies and emphasizing the potential of ATH434 to slow disease progression [5] - The principal investigator noted that the consistent changes in UMSARS and imaging measures support the continued development of ATH434 for MSA treatment [5]